65651247225 has 60 divisors (see below), whose sum is σ = 121655507820. Its totient is φ = 35000553600.

The previous prime is 65651247223. The next prime is 65651247227. The reversal of 65651247225 is 52274215656.

65651247225 is a `hidden beast` number, since 6 + 565 + 12 + 4 + 72 + 2 + 5 = 666.

65651247225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (65651247223) and next prime (65651247227).

It can be written as a sum of positive squares in 6 ways, for example, as 11700965241 + 53950281984 = 108171^2 + 232272^2 .

It is not a de Polignac number, because 65651247225 - 2¹ = 65651247223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (65651247223) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 7506355 + ... + 7515095.

It is an arithmetic number, because the mean of its divisors is an integer number (2027591797).

Almost surely, 2^65651247225 is an apocalyptic number.

It is an amenable number.

65651247225 is a deficient number, since it is larger than the sum of its proper divisors (56004260595).

65651247225 is a wasteful number, since it uses less digits than its factorization.

65651247225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12472 (or 12458 counting only the distinct ones).

The product of its digits is 1008000, while the sum is 45.

The spelling of 65651247225 in words is "sixty-five billion, six hundred fifty-one million, two hundred forty-seven thousand, two hundred twenty-five".